Nb微合金化对Cr-Ni-Mo渗碳齿轮钢组织和性能的影响  

Effect of Nb microalloying on microstructure and properties of Cr-Ni-Mo carburized gear steel

作　　者：桂伟民 刘义[1] 周根树[2] 何亮亮[1] 王梦梦 汤文馨 Gui Weimin;Liu Yi;Zhou Genshu;He Liangliang;Wang Mengmeng;Tang Wenxin(Shaanxi Fast Gear Co.,Ltd.,Xi'an Shaanxi 710119,China;School of Materials Science and Engineering,Xi'an Jiaotong University,Xi'an Shaanxi 710049,China)

机构地区：[1]陕西法士特齿轮有限责任公司,陕西西安710119 [2]西安交通大学材料科学与工程学院,陕西西安710049

出　　处：《金属热处理》2021年第1期114-119,共6页Heat Treatment of Metals

摘　　要：研究Nb元素对Cr-Ni-Mo系合金在不同渗碳热处理工艺下组织和性能的影响。结果表明,不同渗碳工艺下Nb元素对表面硬度及表面残留奥氏体含量、非马组织影响不大。但是,通过Nb元素细化晶粒的试验钢,在较长的渗碳工艺下能使得有效硬化层深加深10%且获得更细的表层马氏体片层组织。Effect of Nb on microstructure and properties of Cr-Ni-Mo alloyed gear steel under different carburizing processes was investigated.The results show that Nb element has little influence on surface hardness,retained austenite content and non-martensite microstructure in the carburizing layer under different carburizing processes.However,the test steel with Nb element refining grain can make the effective hardening depth deepen by 10%and obtain a finer surface lamellar structure of lath martensite after a longer carburizing process.

关 键 词：微合金化 Nb元素 渗碳热处理 微观组织 性能 

分 类 号：TG142.1[一般工业技术—材料科学与工程]